Speaker
Description
Nonlinear deformations are a key ingredient for applications of rheologically complex materials,
e.g. for the processing of polymeric materials stretching, orientation, dissentaglement of
polymer chains occurs, with the interactions between flow field and constituents dictating the
overall flow dynamics and subsequent material properties/performance. In this framework, we
focus mainly on nano-filled suspensions and polymer composites in oscillatory and steady
shear for a various nanofillers, e.g. graphene, nanocelulose etc.. Of particular importance is the
analysis of the oscillatory shear stress output signal analysis in the framework of Fourier-
Transform (FT) analysis and Tchebyshev polynomial decomposition. The effects of orientation
dynamics and morphological fingerprinting are highlighted, with rheological percolation
thresholds determined with superior sensitivity using nonlinear material parameters and
nonlinear features hinting at the filler morphology of percolated network dynamic response.
